<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>首个页面</title>
    <style>
        header{
            width: 100%;
            height: 100px;
            background-color: blueviolet;
        }
        header nav{
            width: 960px;
            height: 100px;
            background-color: brown;
            margin: 0 auto;
            text-align: center;
        }
        header nav span{
            line-height: 100px;
            margin-left: 30px;
        }
        header nav span a{
            color: black;
            font-weight: 900;
            text-decoration: none;
        }
    </style>
</head>
<body>
    <header>
        <nav>
            <span><a href="#">首页</a></span>
            <span><a href="#">吃</a></span>
            <span><a href="#">喝</a></span>
            <span><a href="#">玩</a></span>
            <span><a href="#">乐</a></span>
            <span><a href="#">睡</a></span>
        </nav>
    </header>
    <!-- 
        cli 命令行操作
        gui 可视化工具操作
     -->
</body>
</html>